Means for operating casement windows



T. H. LUDLOW.

MEANS FOR OPERATING CASEMENT WINDOWS. APPLICATION FILED APR. I6, 1921.

2 SHhETS-SHEET l.

n" Y "IIIIIIIIIQ" IIIIIIIIII Patented Mar. 14,1922.

T. H. LUDLOW. MEANS FOR DPERATING CASEIVIENT WINDOWS.`

APPLICATION FILED APR. I6, I92I. Y

Patented Mar. 14, 1922.

2 sHeer's-SHEET 2.

. I I I I I TIPTON E. LUDLOW, OF CHANDLER, ARIZONA.

MEANS FOR OPERATING CASEMENT WINDOWS.

Specification of Letters Patent. Patented Ian 14, 1922.

Application filed April 16, 1921. Serial No. 461,852.

T0 (1U- -Nmm/ 'it may concern.'

Be it known that I, TIrToN H. LUoLow, a citizen of the United States, residing at Chandler, in the county of Maricopa and State ot' Arizona, have invented certain new and useful Improvements in Means for Operating Casement lvindows, of which the following is a speciiication.

This invention relates to means for operating easement windows and embodies improvements on earlier devices of that character which employ a screw and links or vievers operated thereby.

My improvements embody a novel combination ot screw, traveling nut, push ylink or bar. swinging guide of Ipeculiar form and special function, and a pushing and pulling connection between the link and the sash or window.

The invention, still further, embodies the arrangement of the operative parts in a box or case insuring that when the device is applied to thc weight box or casing in .proper position and connected to the window, it will necessarily operate accurately and satistactorily.

The invention still further embodies means vwhereby the length of the stem of the operating crank may be adjusted, within certain limits, to di'erentwidths of window stools without necessitating change in the size of the crank but, of course, where the window has an extra width stool it will be necessary to use extra long crank stems.

One of the novel features of my invention is the bell crank shaped swinging guide which is pivoted at one end and at its other end connected to the push bar or linkage which connects the nut to the window. This improved feature insures correct guidance without any possibility of binding of the parts, and yet enables the operative parts to be contained 'within a small, very compact, box or casin which may be set in the weight space box ack of the window jamb.

My improved mechanism is self-locking so that the window remains closed, open, or in any intermediate position to which it may be set by turning the crank,'without"having to resort to any extraneous locking means.

My improvements overcome what have, in practice, been serious defects in easement window operating means of which I have knowledge.

In the accompanying drawings:

Figure 1, 'is a detail horizontal section through the weight space box, casing, and

sash of a easement window, showing my 1nvention installed and partly in section and dotted lines;

Fig. 2, is' a vertical section through Fig. 1;

Fig. 3, is a view like Fig. 3, taken at rightangles thereto; and

Fig. 4, is a front elevation. The easement window 1 is suitably hinged at 2. At any heightl of the window, for instance at the bottom of the sash or midway the height thereof, it is provided with a pushl bar 3 of 4any desired length. .This may be contained within a hole or bore in the sash 1 if at the bottom of the latter, or, the bar may be screwed onto the face of the sash or window 1 if midway the height thereofand in that event bev exposed on the inside of the window. This bar is used for the purpose of taking up the pushing and pulling strains incident to the use of the opener constituting the present invention.

My improved mechanism is contained within a box 4 which is small` flat, and compact. In practice this box will approximatedimensions ot' 4% x 2% setting which is set into the weight space box 5 back of the window jamb 6.

The bottom of the casing or box 4 has a depending trough or guide 7 in which travels and is guided against turning, the nut 8 whose movement causes the window to be opened or closed.

A screw 9 extends lengthwise of the troughshaped guide 7 and on this screw works the nut 8. The screw is journaled in the casing 4 at its end 1() and also in a bushing 11 which is set in the tace ot the casing 4, the mounting of the screw preventing it from coming out of position. Theend-ot1 thescrew is provided with a squared part 12 on which is slipped a sleeve 13 which is adapted to turn in the window casing 14 and, in turn, receives the squared .end of a crank 15. By this means accommodation is provided, within certain limits, for different thicknesses of the casing 14 but where the window stool is of unusual size it will be necessary to use a crank having a longer stem.

To fit the box 4 in position and insure correct adjustment so that there will be no binding of the operative Vparts and to insure the exactness of distances between pivots that is necessary to afford proper clearance, there is provided a boxing or shell 16. The shell 16 is provided with a plate 17 riveted thereto 20 wlndow 1 is closed, one leg of the lever 3() at 18 and provided with adjustable slot and tor or spacer 20 maintains the boxing 16 in proper relation to the box 4, there being a bolt 2l passing through said separator and connecting the box 16 to the box 4. An anchor and adjusting plate 22 serves to limit the swing of the sash.

The nut 8 is provided With a lug 23 having a nut and on which is pivoted a push bar 24 which has a forked end 25. Another push bar or link 26 is pivoted in between the jaws on the fork on a pin 27. The forked end 28 of the push bar 26 is pivoted at 29 to the end of the bar 3.

A bell crank lever 30 which is pivoted on a rivet 31 to the box 4, hasl its other end pivoted to the pin 27. This bell crank lever 1 s-so arranged that when the nut 8 is at the outer end of the trough 7 and the easement will be disposed crosswise of the screw 9 and the other leg parallel'thereto so that the bell crank lever may swing freely respective legs in reverse position relative to the length of the screw. The bell crank lever guide 30 during its movements serves as a guide which lixes and determines the arcuate path in which vthe pivot 27 must swing. Consequently there is no possibility of binding or jamming of the parts j the use of this member 30 permits a very compact arrangement of the elements which would otherwise be difficult to attain if ease and accuracy of action are accomplished. I thereby overcome serious defects heretofore incident to the use of Casement window operto bring its and, further, j

evers and obtain a powerful easily operating and simple mechanism which insures proper operation and is at the same time self-locking so that the window will remain where set whether it be closed, open, or in anyintermediate. position.

My construction, being unitary so far as the operating means is concerned, is easily set in position even by more or less unskilled labor.

I claim:

l. In a easement -window operator, the combination with a lscrew, of a movable member operated thereby, a linkage comprising articulated push bars pivoted to the movable member and to the window, and a bell crank lever having a pivotal mounting and also pivotally vconnected t0 the linkage where the component members thereof are pivoted together, said bell crank lever constituting a guide which predetermines the path of travel of members of said linkage.

2'. In a easement windowoperator -the combination with a box having a guide trough, of an operating screw mounted in the box, a nut working on the screw and slidable in the guide trough, a linkage comprising ating devices employing screws, nuts and bolt connections 19 to the box 4. A separal component members pivoted together one of l TIPToN H. LUDLow.

which is pivoted 

